Question 2;
Yes there can be a liability upon you in case of accident. If you are negligent in any manner and cause the accident then you could be held liable. If you are driving the MH and it has a defect that can be shown you knew or should have known about then you can be liable. An extreme example of this theory is; You drive the MH down the highway with a wheel missing and crash into something. Even though the defect was the cause of the accident the fact you should have known the wheel was missing would make you liable. A more practical example would be spongy brakes.
I would also have some sort of written agreement with the owner. This would prevent next of kin from getting squirrely abut you trying to "steal" the MH.
